Stone-dressing machine



=(No Model.) A 2 Sheets-Sheet' 1f R. MARQUART. STONE DRESSING 'MAGHINE- No. 563,499. Patented July 7, 1896.

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R. MARQUART. STONE DRESSING MACHINE. No. 563,499. Patented July `7, 1896.

' UNITED STATES RUDOLF MARQUART, OF NEW YORK,

PATENT OFFICE.

N. Y., AssiGNoE To HIMsE'LE, AND

ROBERT O. FISHER, OF NEV ROCHELLE, AND EDWARD B. TOMPKINS,

-OF BROOKLYN, NEIV YORK.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 563,499, dated J' uly 7', 1896. Application `filed September 24,1895.' Serial No. 563,561. (No model.)

T @ZZ whom it may concern:

Be it known that I, RUDOLF MARQUART,

of the city, county, and State of New York,

have invented a certain new and useful Improvement in Stone Sawing Machines, of

which the following is a specification.

I will describe a stonesawing machine embodyin g the features of myimprovement, and then point out its novelty in the claims.

In the accompanying drawings, Figure lis a side elevation of a stone-sawing machine embodying my improvement. Fig. 2 is an end elevation thereof. Fig. 3 is a top View of the same, certain portions being omitted. Fig. 4 is a plan view, enlarged, showing devices for securing the saw-blade in position.

Similar letters of reference designate corresponding parts in all figures.

A designates the foundation, upon which is erected the framework supporting the saw and the various parts of the saw mechanisms.

The framework may comprise uprights B, there being in the present instance two of these uprights on each side of the machine at each end of the latter. Longitudinal beams B', secured to these uprights, and crosspieces B2 form a convenient framework for the machine. Y

C is a vertical guide secured to the inner face of each upright B. A sliding plate or block D is provided at its extremities with means, preferably including gibs, for iitting the guides O on each pair of said uprights B, that it may have a vertical movement thereon.

The interior or adjacent face of each plate D is formed with a longitudinal guideway d, with which coperates a projecting tongue d', extending from the adjacent face of the saw frame or sash E.

The saw-frame is of rectangular construction, having upper and lower compressionbars c and e' and end pieces c2 c3, to which the compression-bars are firmly secured.

In mounting the saw-frame, I prefer that the lower compression-bar c should be situated below the upper surface of the foundation A, the latter having an opening for that purpose. rIhe saw-blade F will be stretched 5o between the end pieces e2 c3 by any suitable means. Forv instance, one end piece e2 may have one or more slotted bars f secured to the end piece by a cross pin or pins f', while through the slotted portion of the bar fpasses a cross-pin f2, protruding through an opening in the saw-blade. At the opposite extremity the saw-blade is similarly engaged with a slotted bar f3, the opposite. extremity of this bar being threaded and supplied with a nut abutting against a plate f4, whereby a tension can be put upon the blade. Setscrews f5 may also be supplied for centering and steadying the upper edge of the sawblade.

G is the usual pitxnan for reciprocating the saw-frame. A

Returning now to the mechanism utilized for supporting the saw-frame and foreffecting its movements transverse to the line of its reciprocations, H is a rod secured at its lower end to the plate D. At their upper extremities the rods H at each end of the machine are affixed to and connected one with the other by a yoke h, from which also projects upwardly a screw-rod h', rigidly secured to the yoke.

I is a bevel-wheel with a threaded bore engaging with the screw-rod h', the rotation of which bevel-wheel, by means to be described, `elevates or depresses its corresponding screwrod h', and consequently the saw-frame.

K is the feed-rod, journaled in suitable bearings at the upper portion of the machine and supporting bevel-wheels k, engaging with the corresponding threaded bevel-wheels I. The means for rotating this feed-rod comprise a worm-wheel la concentric with the rod, a coacting worm k2, secured to the Worm-shaft las, and a cone-pulley ki, driven from any suitable source, for driving the worm-shaft. I may employ gearing 765 for transmitting motion from the shaft driven. by cone-pulley 7a4 to the worm-shaft.

Instead of securing the worm-wheel 7c rigidly to the feed-rod K, l will preferably secure the same to a sleeve lc, having a sliding iit upon the feed-rod, and engaged therewith by a clutch L. One extremity of the sleeve lo is notched to form one clutch member, while the opposite member is formed by the ICO notched edge of a second sleeve Z, sliding lengthwise of the feed-rod, but compelled to rotate therewith by an engaging key and keyway. (Not shown.) A clutch-le ver shaft Z eX- tends across the upper part of the machine and is provided with a clutch-lever Zzat each side of the machine. By thus mounting the worm-wheel upon the feed-rod, I am enabled when the clutch L is in the disengaging or oif position to impart to the feed-rod a more rapid movement for adjusting the saw-blade rapidly to place. The means I have shown for accomplishing this rapid movement of the feed-rod consists of a sleeve M, iittedto move easily lengthwise of the feed-rod, but compelled to rotate therewith by an engaging key and keyway. At opposite ends of the sleeve M are secured bevel-wheels fm 'm'. An oscillating shaft m2 extends transversely to the sleeve M, the former having a rigid arm m3 whose upper extremity embraces pins eX- tending from a collar m5 loosely fitting a groove around the sleeve M. It is evident that when this shaft is oscillated, the sleeve M and consequently the bevel-wheels m and m' will move iirst in one direction and then in the opposite. A lever m'L is secured to the shaft m2 at each side of the machine for oscillating the shaft.

N is a fixed bevel-wheel journaled in supports at the side ofthe machine and positively driven by any suitably-applied power. It is so mounted that it may engage with either bevel-wheel mand m,and consequently drive the feed-rod in one or the other direction.

The operation of the device may be described as follows: The stone having been placed beneath the saw-blade, the saw-frame is set into reciprocation through the connecting-pitman, the blade having been adjusted to position by the rotation of either the bevelwheels m or m', as already described. The clutch L is now thrown into engagement, the

bevel-wheel m or m' having been previously disengaged and the feeding of the saw-blade commences and continues as long as the machine operates and the clutch L is in engagement.

Having described my invention, what I consider as new, and desire to secure by Letters Patent, is-

l. The combination of areciprocating sawframe, plates or blocks formed with guides defining the movement of the frame, screwrods for adjusting the plates or blocks to cause the feeding of the frame, a feed-rod extending lengthwise of the machine and provided with bevel-wheels meshing with similar wheels applied to said screw-rods, a worm and worm-wheel for imparting a feeding movement to said feed-rod, a clutch for engaging the worm -wheel with and disengaging it from said rod, a power-driven gear, and gears adjustable into and out of action with the power-driven gear for producing a rapid movement of the saw-frame in either direction, substantially as specified.

2. The combination with a reciprocating saw-frame, of the screw-rods 7L 7L', the bevelwheels I, I, engaging therewith, the feed-rod K having bevel-wheels 7s, 7c, engaging with the bevel-wheels I, I, the worm k2 and wormwheel 7a for driving the rod, the clutch L for engaging said worm-Wheel with and disengagingv it from the rod K, the sleeve M moving lengthwise of the rod K and supporting bevelwheels fm, m', and the power-driven bevelwheel N for driving either one of the bevelwheels m, on', substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RUDOLF MARQUART.

Witnesses:

ANTHONY GREF, WM. A. PoLLocK. 

